/*
 * Copyright 1999-2017 Alibaba Group Holding Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package studio.raptor.sqlparser.dialect.oracle.ast.stmt;

import java.util.ArrayList;
import java.util.List;
import studio.raptor.sqlparser.ast.SQLExpr;
import studio.raptor.sqlparser.dialect.oracle.ast.stmt.OracleSelectPivot.Item;
import studio.raptor.sqlparser.dialect.oracle.visitor.OracleASTVisitor;

public class OracleSelectUnPivot extends OracleSelectPivotBase {

  private final List<SQLExpr> items = new ArrayList<SQLExpr>();
  private final List<OracleSelectPivot.Item> pivotIn = new ArrayList<Item>();
  private NullsIncludeType nullsIncludeType;

  public OracleSelectUnPivot() {

  }

  public void accept0(OracleASTVisitor visitor) {
    if (visitor.visit(this)) {
      acceptChild(visitor, this.items);
      acceptChild(visitor, this.pivotIn);
    }
    visitor.endVisit(this);
  }

  public List<OracleSelectPivot.Item> getPivotIn() {
    return this.pivotIn;
  }

  public List<SQLExpr> getItems() {
    return this.items;
  }

  public void addItem(SQLExpr item) {
    if (item != null) {
      item.setParent(this);
    }
    this.items.add(item);
  }

  public NullsIncludeType getNullsIncludeType() {
    return this.nullsIncludeType;
  }

  public void setNullsIncludeType(NullsIncludeType nullsIncludeType) {
    this.nullsIncludeType = nullsIncludeType;
  }

  public static enum NullsIncludeType {
    INCLUDE_NULLS, EXCLUDE_NULLS;

    public static String toString(NullsIncludeType type, boolean ucase) {
      if (INCLUDE_NULLS.equals(type)) {
        return ucase ? "INCLUDE NULLS" : "include nulls";
      }
      if (EXCLUDE_NULLS.equals(type)) {
        return ucase ? "EXCLUDE NULLS" : "exclude nulls";
      }

      throw new IllegalArgumentException();
    }
  }
}
